Flora of North America species comparison

sparsely pubescent to tomentose (especially on abaxial leaf faces and among heads).

glabrous or lightly floccose-tomentose proximally when young.

single or loosely clustered.

single or loosely clustered.

progressively reduced distally;

petiolate;

blades triangular, triangular-lanceolate, or lanceolate, 3–10(–15) × 1.5–4 cm, bases cordate to truncate or tapered, margins serrate or dentate (mid and distal leaves sessile, bractlike).

evenly distributed (proximal often withering before flowering);

petiolate or subsessile;

blades lanceolate or narrowly lanceolate to sublinear, 5–15(–20+) × (1–)1.5–4 cm, bases tapered, margins dentate to subentire (distal leaves smaller, bractlike).

0.

± 5 or ± 8;

corolla laminae 5–10 mm.

± 8, 6–9 mm, tips green.

± 8 or ca. 13, 4–9 mm, tips usually green, sometimes black.

of 2–5+ lance-deltate to filiform bractlets (lengths 1/5–1/2 phyllaries).

of 2–6 linear to filiform bractlets (0.5–5 mm).

nodding, 6–10+ in racemiform-paniculiform arrays.

30–90+ in corymbiform to subpaniculiform arrays.

glabrous.

glabrous or glabrate.

= 40.